To provide a hydrophilic controlled release pharmaceutical preparation without the formation of dose-damping.

Such the hydrophilic controlled release pharmaceutical preparation includes a pregelatinized drum-dried waxy corn starch, one or more effective ingredient(s), one or more viscous hydrophilic polymer(s) and a medicinally acceptable compounding agent depending on a case. The preferred hydrophilic polymer includes hydroxypropyl cellulose and hydroxypropyl methylcellulose.